#include "Nguoi.h"
#include "NguoiViet.h"
#include "NguoiAnh.h"
#include<conio.h>
int main()
{
	Nguoi*n;
	NguoiViet nv;
	NguoiAnh na;
	n=&nv;
	n->Chao();
	n=&na;
	n->Chao();
	//return 0;
	_getch();
}